Up-and-coming senator Nick Rast's young son is terminally ill with leukemia. A mysterious faith healer, Gregory Wolfe, appears and seems to cure the boy. Rast's wife Sandy falls in love with Wolfe, but the powerful interests behind Rast's career, represented by geriatric monster Doc Wheelan are less happy with events.
Unfortunately the movie Harlequin is not yet available on HBO Max.
| Editing | Adrian Carr | Editor |
| Directing | Simon Wincer | Director |
| Production | Antony I. Ginnane | Producer |
| Production | William Fayman | Executive Producer |
| Camera | Gary Hansen | Director of Photography |
| Directing | Caroline Stanton | Continuity |
| Writing | Everett De Roche | Screenplay |
| Crew | Jon George | Additional Dialogue |
| Crew | Neill D. Hicks | Additional Dialogue |
| Production | Jane Scott | Associate Producer |
| Sound | Brian May | Original Music Composer |
| Production | Bernard Hides | Production Designer |
| Costume & Make-Up | Terry Ryan | Costume Designer |
| Costume & Make-Up | Lois Hohenfels | Makeup Artist |
| Costume & Make-Up | Cheryl Williams | Hairdresser |
| Directing | Grant Harris | Second Assistant Director |
| Directing | Michael McKeag | First Assistant Director |
| Directing | Jenny Miles | Third Assistant Director |
| Art | Virginia Bieneman | Draughtsman |
| Art | Noel Butler | Construction Grip |
| Art | Steve Courtley | Construction Manager |
| Art | Michael Dore | Construction Grip |
| Art | Michael Langton | Construction Grip |
| Art | Clark Munro | Props |
| Art | Owen Paterson | Assistant Art Director |
| Art | Peter Sands | Construction Grip |
| Art | Wayne Smith | Construction Grip |
| Sound | Peter Fenton | Sound Mixer |
| Sound | Steve Lambeth | Assistant Sound Editor |
| Sound | Steve Lambeth | ADR & Dubbing |
| Sound | Terry Rodman | ADR & Dubbing |
| Sound | Mark J. Wasiutak | Boom Operator |
| Sound | Gary Wilkins | Sound Recordist |
| Crew | Chris Murray | Special Effects Assistant |
| Crew | Conrad Rothmann | Special Effects |
| Visual Effects | Roger Cowland | Visual Effects |
| Crew | Peter West | Stunt Coordinator |
| Camera | Nicholas Clark | Still Photographer |
| Camera | Ross Erickson | Key Grip |
| Lighting | Reg Garside | Best Boy Electric |
| Camera | Jan Kenny | Focus Puller |
| Camera | Robin Morgan | Grip |
| Lighting | Mick Morris | Gaffer |
| Camera | Peter Moss | Camera Operator |
| Camera | Jeremy Robbins | Clapper Loader |
| Costume & Make-Up | Vicki Rowland | Wardrobe Assistant |
| Editing | Arthur Cambridge | Colorist |
| Editing | Margaret Cardin | Negative Cutter |
| Sound | Brian May | Conductor |
| Sound | Russell Naughton | Assistant Music Supervisor |
| Sound | Roger Savage | Recording Supervision |
| Writing | Russell Hagg | Script Editor |
| Production | Lynn Barker | Production Accountant |
| Production | Jennifer Barty | Production Secretary |
| Crew | William Fayman | Presenter |
| Production | Daro Gunzburg | Production Assistant |
| Crew | Willie Kay | Creative Consultant |
| Crew | Ross Skiffington | Creative Consultant |
| Production | Lynette Thorburn | Publicist |
| Production | Sylvia Van Wyk | Producer's Assistant |
